Bolt-threading machine.



A. B. LANDIS.

BOLT THREADING MAGHINE'. APPLIIOATION FILED MAR. 11, moo.

1,017,878. Patented Feb. 20, 1912. I

B SHEETS-SHEET 1.

WITNESSES} I 1. ENTOR.

ATTORNEY.

A. B. mum-5.; BOLT THREAD INGMA'GHI NL I APPLICATION FILED I909.

Patented Feb. 20, 1912.

e SHEETS-SHEET 2.

WITNES$ES.- j /K A. B. LANDIS.

BOLT THREADING MACHINE.

APYLIOATION TILED MAR. 11, 1909.

Patented Feb.20, 1912.

6 sums-sum a.

' A TTORNEY.

A. B. LANDIS.

.BOLT THREADING MACHINE.

APPLICATION FILED MAR.11, 1909.

Patented Feb. 20, 1912.

6 SHEETS-SHEET 4.

NTOR.

MM; cf

v BY fig? WITNESSES.

ATTORNEY.

A. B. LANDIS.

BOLT THEEADING MACHINE.

APPLIOATION FILED MAR. 11, 1909.

Patented Feb. 20, 1912.

6 SHEETS-SHEET 5.

L-VVEN TOR. M 463M I ATTORNEY.

A. B. LANDIS. BOLT THREADING MACH E. APPTLIOATION FILED MAR. 11. 1909.

Patented Feb. 20, 1912.

6 SHEETS-SHEET 6.

WITNESSES.- zi'. 3

ATTORNEY.

UNITED STATES PATENT OFFICE.

ABRAHAM B. LANDIS, 0F WAYNESBORO, PENNSYLVANIA.

BOLT-THREADING- MACHINE.

Specification of Letters Patent. Patented Feb. 20, 1912.

Application filed March 11, 1909. Serial No. 482,800.

To all whom it may concern:

Be it known that I, ABRAHAM B. LANDIS,

a citizen of theUnited States, residing at be hereinafter more fully described and claimed.

'Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a side elevation of a bolt-threading machine embodying my improvements, the bed or frame thereof being shown in sect-ion, Fig. 2 a cross section on the dotted line 2--2 in Fig. 1, Fig. 3 a detail cross section on the dotted line 3-3 in F 1, Fig. A a cross section on the dotted line 44 in Fig. 3, Fig. 5 a detail section on the dotted line 55 in Fig. 3, Fig. 6 a detail view looking in the direction indicated by the arrows from the dotted line 6-6 in Fig. 3, Figs. 7 and 8 detail views illustrating the position of the parts shown in Fig. 6 at different points in the movement of the carriage, and Fig. 9 a view similar to Fig. 3 illustrating a modified construction.

In said drawings the portions marked A represent the bed or frame of the machine, B the cutter-head, C the carriage, and D, D the adjustable blocks of the work holding clamp or vise. v

The bed or frame A may be of any appropriate construction provided with ways on the top for the carriage and having bearings for the shaft carrying the cutter-head, and other parts of the mechanism.

The cutter-head B is preferably of the construction shown in my application No. 458,381, filed October 19, i908, or may be of any construction found. suitable. It mounted on a shaft B in bearings provided therefor on the top of bed A. on which is mounted a cone driving pulley B which may be connected by a belt to any suitable power shaft. A lever B is connected to the cutter-head for opening and closing the same, as will be presently described, the lower end being pivoted at Z) in a'suitable seat provided in the frame A. Said lever B at its upper end surrounds said cutter-head and is connected to the shifting ring thereof by pivots b on each side.

The carriage C is mounted to slide upon ways 0' mounted on the top of bed A, said ways consisting preferably of round bars mounted at their ends in suitable supports inside of the outer edges of said bed. Said bars are formed with racks on their under sides for a distance to provide for the travel of the carriage. A transverse shaft C is journaled in said carriage and provided with pinions 0 at each end the teeth of which mesh with the teeth of said racks on the under side of said tracks C. transverse shaft C is journaled in said carriagc above said tracks and provided near one end wit-h a gear wheel 0 the teeth of which also engage the teeth of the pinion on one end of shaft- C Said shaft C is also provided with a notched wheel C and has a lever C mounted loosely thereon and formed bifurcated to straddle said wheel C". A pivoted pawl C is mounted on a pivot c in' said lever with a point 0* adapted to engage with the notches in said wheel C. A

spring 0" serves to hold said point normally in engagement with said wheel and a finger lever 0, pivoted at 0" near the upper end of said lever C and connected to the pawl C by a push pin 0 is DIOVlClCCl for throwing said pawl out ofengagement. One end of said pawl C is formed with a cam point 0 adapted to engage under a roller C on the carriage at one extreme of the movement of the lever C to automatically disengage pawl'C, as shown in Fig. 7, while its other end is formed with another cam face 0 adapted to engage with a roller C and disengage the pawl from thewheel C at the other extreme of the movement of the lever C as will be presently described.

The clamping-jaw carrying-blocks D. D are mounted upon a transverse rod D which is journaled at its ends in bearings cl, d on the. carriage C. Said rod is screw-threaded being formed with a right-hand thread on one side of its center and a left-hand thread on the other side. the central portion and its A second and D are mounted on said screw-threaded portions by means of correspondingly screw-threaded perforations. A hand wheel comprising a hub D with radial arms (Z is mounted upon one end of said rod for operating it. Said rod is held from longitudinal movement by said hub D on one side of the bearing (Z' and a collar (Z secured to said rod on the other side of said bearing. In the upper adjacent corners of said blocks D and D are formed rectangular recesses in which are serrated clamping jaws D and D respectively, said jaws being formed with angular notches in their adjacent faces, a notch of different size being formed in each face to adapt said jaws for holding work of different sizes. Said jaws are formed with tapered corners and are held in position by means of clamps d and (Z5, respectively, each being formed at one end with a longitudinal flange, (l and to engage a notch in the upper face of the respective blocks and with a flange with a tapered face projecting downwardly from their adjacent ends adapted to rest upon the tapered corners of said jaws. Clamping screws d and d, respectively, projecting into screw-threaded perforations in said blocks, serve as a means for clamping said jaws in position in said recesses. Coiled springs d and d, respectively, are preferably mounted around said screws (Z and (Z to lift said clamps when the screws are backed. Each of said blocks is formed with a downwardly depending arm or portion, D and D respectively each having a bottom flange with an internal tapered face, d and d, respectively, and a correspondingly tapered flange at the upper end, d and d respectively. A sliding bar, D and D respectively, with ends tapered to correspond with the taper ofthe top and bottom of said arms D and D are mounted and adapted to slide in vertical grooves in a part C secured rigidly to the carriage G with one edge projecting into a recess formed in said arms D and D respectively, and thus serve to hold said blocks D, D in a parallel position at all times. To illustrate: It will be seen by an examination of Figs. 3, 4 and '5 that as the screw-rod D is turned by means oft-he hand-wheel d to clamp the work 'w between the jaws D and D- the strain will tend to tilt the tops of blocks D, D away from each other and toward each other at their lower edges, thus causing said blocks to bind upon the threads of rod D and their engaging threads, or

perhaps break said threads under the great strain. By the arrangement described said strain instead of being thrown upon the threads of the screw-rod and blocks is thrown against the bars D and D which are rigid in the plate G on the carriage C and thus serve to hold said blocks perfectly parallel. As the blocks D and D are operated toward and from each other by means of turning the right and left hand screw D said bars D and D will slide up or down in their grooves in the part C being operated by their contact with the angle or cam faces at the top and bottom of the arms D and D of said blocks. Part C which is secured to the carriage .C by bolts 0 is arranged with two lugs C one on each side of the carriage. A screw 0 is inserted in a screw-threaded perforation in said lugs the lower end contacting with the flange 0 of carriage C. By this screw the plate 0 can be adjusted to bring the work held in the jaws of the carriage vertically central with the screw cutting head, the holes in the flange 0 of the carriage C being larger than the bolt 0 to permit this adjustment and also allow of adjustment of the same sidewise with reference to the screw cutting head. By this means correct'alinement of the work with the screw cutting head can always be maintained regardless of any wear of the shaft carrying the screw cutting head or of the carriage upon its tracks.

In Fig. 9 I have shown a modification wherein the balancing of the strain to secure a fixed parallel relation between the blocks carrying the clamping jaws is secured, wherein the blocks are formed with tapered faces 5 and 6 on appropriate parts near the top and lower side of upwardly extending parts. Said facesengage with correspondingly tapered ends of a pin or bar 7 mounted at each side to slide in a suitable perforation in a part 8 secured to the carriage. The operation will be similar to that just described for the principal form, the arms 10 and 11 serve to hold the blocks of which they are a part parallel by reason of being held in a fixed vertical position by the contact of the tapered faces 5 and 6 with the tapered ends of the sliding pins 7.

The general operation of the machine is as follows: The work W being clamped between the work holding jaws D" and D as shown in Fig. 3 and just described and the parts being in the position shown in Fig. 1, the carriage C is moved forward by means of the lever C, which operates through the toothed wheel 0' and pinion 0 to turn the shaft C and through the engagement between the said pinion and the racks on the under side of the tracks C move said car-' riage forward until the end of the work W engages with the die on the cutter-head B.

- The operation of the die will then continue the forward movement of the carriage, pulling thework into it until a depending arm 15 on the carriage D strikes a stop 16 on a rod 17, which is adjusted to the proper position by means of the screw-threaded connection between said stop and rod, when said rod 17 will be forced forward and a collar 18 near its front end with a camshaped face will operate to raise a latch 19 out of engagement with the lever B? and spring 20 draws said lever backward to operate the mechanism for opening the die of the cutterhead B and release the work. \Vhen this has been done the operator by means of said lever C draws the carriage back until. the work is free from the cutter-head and the arm 15 contacts withanother adjustable stop 21 on the rear end of.rod 17 drawing said rod rearward until its head 22 contacts with rear side of said lever B and closes the die, the spring 20 serving to throw the latch-19 into engagement with said lever to secure said die closed. The work W is then removed'by expanding the holding jaws D,

D through the medium of the screw-rod D another blank put in place and the operation repeated. When it is desired to move the carriage a greater distance than an easy swing of the lever C in either direction, the

pawl C and ratchet wheel C are utilized through the medium of the fingerlever c by which the pawl can be disengaged from said notched wheel and the lever C swung freely in either direction the distance desired without moving the shaft C and the wheel C thereon, when, by releasing said finger lever, the spring 0 will operate to rengage said pawl C and connect said lever Q with the shaft C When the movement of the carriage C, toward or away from the screw cutting head is for such a distance that the lever C would pass to a position approximately 45 degrees either way, the cam ends 0 or 0 will contact with the rollers C or' C and automatically release said lever from 'operativeconnection with shaft C as will be readily ,understood.

Said rollers also serve as a stop on which complete apparatus is vthus provided and.

one which will make but little dirt in operation and will do its work in-a perfect manner.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent,-is l 1. In a boltthreading machine, the com bination of a frame, the cutter-head, the work carriage mounted on longitudinal tracks arranged insidethe top of said frame, said tracks formed with racks on one side,

pinions on a shaft carried by said carriage engaging with said racks, means for operating said pinions to slide said carriage back and forth on said tracks, the work holding clamp on said carriage, and means for operating said clamp, substantially as set forth. V

2. In'a bolt threading machine, the bination, of a frame, a cutter-head,.a work carriage, means for sliding said carriage back and forth, and a work-holding clamp on said carriage comprising transversely adjustable blocks carrying clamping jaws in adjacent faces thereof, each of said blocks being formed with a part extending to one side of the adjusting screw and parallel with each other and formed with tapered faces adapted to contact with sliding parallel bars mounted in grooves in a rigid part and formed with correspo'ndingly tapered ends, said bars and said adjusting screw, substantially as set-forth.

com-- 3. A bolt threading machine, comprising a work-holding-clamp consisting of blocks" mounted on an adjusting screw, said screw,

'each block carrying a jaw of the clamp and formed with a projecting part extending to one side of said adjusting screw and formed with tapered faces, bars mounted to slide in grooves in a fixedpart of the caririage adjacent to said parts and formed with tapered ends adapted-to engage the tapered faces of said parts and hold them in ,true parallel relation, substantially as set forth.

4. A bolt threading machine, comprising a work-holding clamp mounted on the carriage and consisting of blocks mounted on a right and left hand screw for adjusting them toward and from each other, each carrying a jaw of the clamp, and each formed with a part extending to one side of said screw and formed W with parallel tapered faces at opposite ends, said screw, a sliding bar with correspondingly tapered ends adapted to engage with the tapered faces of each of said parts mounted to slide in rigid bearings in a part on-the carriage, and said bearings substantially as set forth.

5. A work-holding clamp for a bolt threading machine comprising jaw carrying blocks, means for adjusting them to clamp and release the work, each of said blocks being formed with projecting parts with tapered faces, sliding parts with tapered faces engaging therewith and mounted in rigid bearings, and said rigid bearings, whereby said blocks are held parallel and the strain is received by said sliding parts,:-

substantially as set forth.

6. A work-holding clamp for the carriage of a thread-cutting machine compris ing adjustable jaws formed with tapered faces engaging with the tapered ends of a part mounted to slide transversely in abearing in a fixed adjacent part of the carriage, l

said-sliding part, and said fixed adjacent part, substantially as set forth.

7. A work-holding clamp. comprising adjustable jaws with tapered faces engaging tapered faces of parts mounted to slide transversely in bearings in rigid adjacent parts, said sliding parts, and said rigid adjacent parts, substantially as set fort-h.

8. A work clamp for a thread-cutting part, substantially as set forth.

9. In ,a machine of the character described, the combination, of the cutter-head,

the work carriage, the work clamp on said carriage, said. carriage being mounted on tracks by a rack and pinion connection for operating it, said tracks, said rack and pinion, a lever for operating the pinion connected to the operating shaft by a pawl and ratchet connection, and means for throwing the pawl out of engagement with the ratchet automatically at each end of the movement,

substantially as set forth.

10. In a machine of the character described, the combination, of the carriage, means for operating said carriage comprising a rack and pinion connection between said carriage and thetrack, said track, a lever for operating the pinion connected to the shaft by a pawl and ratchet, said pawl and ratchet, said pawl being formed with a cam projection at each end adapted to contact with a trip to disengage the pawl at the limit of the movement of said lever, substantially asset forth.

11.,The combination of a frame, a workholding carriage, means for holding the work, tracks for said carriage, a rack, a pinion engaging said rack, a gear engaging said pinion, a shaft on which said gear is mounted, a ratchet wheel upon said shaft,

a lever having a pawl engaging said ratchet vwheel, stops by which said pawl is automatically disengaged from said ratchet wheel at the extreme position of said lever, which stops form a rest for said lever, all substantially as set forth.

12. In a work-holding clamp for the carriage of a thread-cutting machine, the com bination of blocks arranged to simultaneously advance toward and recede from each other, clamping jaws seated in said blocks having beveled corners, and clamps arranged to bear on said corners, substantially as set forth.

13. In a work-holding clamp, the combination of blocks arranged to simultaneously advance toward and recede from each other, a clamping jaw-seated in a recess in each of said blocks, beveled corners on said jaws,

clamps bearing on said corners having a. tongue engaging a groove 111 said blocks,

substantially as set fort-h.

14. In a work holding clamp the combination of blocks arranged to advance toward and recede from each other, clamping jaws seated in recesses in said blocks, and clamps engaging beveled corners of said jaws, whereby said jaws are forced diagonally into the corners of said recess, substantially as set forth.

15. In a work-holding clamp the combination of blocks arranged to advance toward and recede from each other, clamping jaws seated in recesses in said blocks, clamps engaging beveled corners of said jaws whereby they are diagonally forced into the corners of said recesses, one end of said clamp bearing on the corner of said jaw and the other end bearing in a groove m said block, substantially as set forth.

16. In a work-holding clamp the combination of blocks, arranged to move toward each other, clamping aws seated in recesses in said block, clamps engaging the corners of said jaws, .one end of said clamp bearing on the corner of s.1d aws and the other end bearing in agroove in said block, a

screw for forcing said clamp upon said block, and a spring for raising it, substantiallyas set forth.

In witness whereof, I, have hereunto set my hand and seal at VVaynesboro, Pa. this 20th day of February, A. D. nineteen hun dred and nine.

ABRAHAM B. LANDIS.

WVitnesses ALF. N. RUSSELL, Gno. H. RUSSELL.

[in s] 

